Dropkick singer allegedly beats Nazi concertgoer

UNDATED (WHDH) -- Dropkick Murphys singer Ken Casey allegedly beat a concertgoer after the man appeared to be making a Nazi salute over and over at a March 13 concert -- and it was all caught on camera.

It's been seen more than a 100,000 times online and the momentum is gaining.

In the video, the fan can be seen apparently acting out a Nazi salute. Then, singer Ken Casey rushes toward the man, bass guitar in hand, and goes after the fan making the offensive gesture.

The video shows chaos breaking out at New York City’s Terminal 5 Club. Casey can be seen apparently knocking the man to the ground before going off the screen.

Minutes later, another band member addresses Casey:

“Nazis are not [expletive] welcome at a Dropkick Murphys show.”

One fan, who witnessed what happened, put on a New York City blog:

“Rocks Off” (via Gawker):

"As the band kicked into T.N.T. by AC/DC some moron started seig heiling (the Nazi salute) in time to the beat.

"Ken Casey noticed this and ran right over to the guy, smashed him in the face, took off his bass and hit him with that and then jumped on him and all out chaos ensued. We could only assume from our vantage point that said Nazi got his (EXPLETIVE) kicked. About 30 seconds later Ken emerged from the pileup with his shirt torn and made his way back to the front of the stage.”

7News spoke with Casey Wednesday night by phone. He declined to comment about the video gone viral.